(You see many of them taking the disbelievers as their friends.) Mujahid said that this Ayah refers to the hypocrites. Allah's statement,

﴿لَبِئْسَ مَا قَدَّمَتْ لَهُمْ أَنفُسُهُمْ﴾

(Evil indeed is that which they have sent forward before themselves;) by giving their loyalty and support to the disbelievers, instead of the believers. This evil act caused them to have hypocrisy in their hearts and brought them the anger of Allah, that will remain with them until the Day of Return. Allah said;

﴿أَن سَخِطَ اللَّهُ عَلَيْهِمْ﴾

(for that (reason) Allah is wrath with them) because of what they did. Allah next said that,

﴿وَفِى الْعَذَابِ هُمْ خَـلِدُونَ﴾

(in torment they will abide) on the Day of Resurrection. Allah's statement,

(And had they believed in Allah, and in the Prophet and in what has been revealed to him, never would they have taken them as friends.) meaning, had they sincerely believed in Allah, His Messenger and the Qur'an, they would not have committed the evil act of supporting the disbelievers in secret and being enemies with those who believe in Allah, the Prophet and what was revealed to him,

﴿وَلَـكِنَّ كَثِيراً مِّنْهُمْ فَـسِقُونَ﴾

(but many of them are rebellious). disobedient to Allah and His Messenger and defiant of the Ayat of His revelation that He sent down.

(82. Verily, you will find the strongest among men in enmity to the believers the Jews and those who commit Shirk, and you will find the nearest in love to the believers those who say: "We are Christians.'' That is because among them are priests and monks, and they are not proud.) (83. And when they listen to what has been sent down to the Messenger, you see their eyes overflowing with tears because of the truth they have recognized. They say: "Our Lord! We believe; so write us down among the witnesses.'') (84. "And why should we not believe in Allah and in that which has come to us of the truth And we wish that our Lord will admit us along with the righteous people.'') (85. So because of what they said, Allah awarded them with Gardens under which rivers flow, they will abide therein forever. Such is the reward of good-doers.) (86. But those who disbelieved and belied Our Ayat, they shall be the dwellers of Hell.)